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Terrier-Improved Orion (41.XXX)
General
The Terrier-Orion rocket system is a two stage spin stabilized rocket system which utilizes a Terrier MK 12 Mod 1 or Mk70 for the first stage and an Improved Orion motor for the second stage. The Terrier motor is 18 inches in diameter and is configured with 2.5 ft2 or 4.8 ft2 fin panels arranged in a cruciform configuration. The Orion motor is 14 inches in diameter and 110 inches long. The vehicle is typically configured with spin motors and the total weight of this configuration, excluding the payload, is approximately 2,900 pounds.
Figure F.8-1: Terrier Improved Orion Launch Vehicle
Vehicle Performance
The Improved Orion motor has a bi-phase propellant system (boost-sustain) that results in thrust levels of approximately 19,000 pounds during the first four seconds of motor burn then trailing off to approximately 3,000 pounds until burnout around 25 seconds. The fins are generally configured to provide a burn out spin rate of four cycles per second. The Orion motor utilizes a clamp-released/load-bearing tail can to interface with the Terrier motor. This is a rail-launched configuration that can be supported at most fixed and mobile launch ranges.

Payloads Payload configurations supported by this vehicle include 14 inch and bulbous 17.25 inch diameters. Payload weights ranging from 200 to 800 pounds can achieve altitudes of approximately 200 to 80 kilometers respectively.
Available support systems include the standard 14 inch Ignition Recovery Module Assembly (IRMA), ACS systems, and nose cones of various configurations. The complete cadre of 17.25 inch diameter support systems is available for use with the bulbous payloads. These include fixed and deployable nose cones; fine, course, rate control, and magnetic ACS systems; separation and despin systems; and forward and aft recovery systems.
Performance Graph The Terrier-Improved Orion launch vehicle configuration and apogee altitude and impact range at various launch elevation angles and payload weights are presented in Figures F.8-2 and F.8-3.
Terrier M - Improved Orion 41.xxx k12 3:1 OGIVE, WFF, October
260 85.0o 200 lb(90.7 kg) 240 83.0o
81.0o 79.0o 77.0o
220
250 lb(113.4 kg)
200
350 lb(158.8 kg) 180 400 lb(181.4 kg) 160 450 lb(204.1 kg) 200 140 500 lb(226.8 kg) 120 550 lb(249.5 kg) 600 lb(272.2 kg) 100 650 lb(294.8 kg) 700 lb(317.5 kg) 750 lb(340.2 kg) 800 lb(362.9 kg) 100
80 50 100 150 200 250 300
Impact Range (km)
Figure F.8-2: Terrier MK12-Improved Orion Predicted Vehicle Performance
Time Above 100 Km (seconds)
300 lb(136.1 kg)
300
Apogee Altitude (km)

400
Terrier MK70-Improved Orion 41.xxx 3:1 OGIVE, WFF, June
85.0o 200 lb(90.7 kg) 350 250 lb(113.4 kg)
500 83.0o 81.0o 79.0o 77.0o
350 lb(158.8 kg) 400 lb(181.4 kg) 250 450 lb(204.1 kg)
400
200
500 lb(226.8 kg) 550 lb(249.5 kg) 600 lb(272.2 kg) 650 lb(294.8 kg) 700 lb(317.5 kg) 750 lb(340.2 kg) 800 lb(362.9 kg)
300
150
200
100 50 100 150 200 250 300 350 400 450
Impact Range (km)
Figure F.8-3: Terrier MK70-Improved Orion Predicted Vehicle Performance
Time Above 100 Km (seconds)
300
300 lb(136.1 kg)
Apogee Altitude (km)